JPH05150039A - Three-dimensional radar device - Google Patents

Abstract

PURPOSE:To improve the tracking performance of tracking beams to a target in a three-dimensional radar device. CONSTITUTION:A three-dimensional radar device is provided with an antenna device 1, a signal processor 2 and a beam control device 3. The signal processor 2 is provided with a means 23 for selecting a tracking beam scanning mode corresponding to the moving state such as track altitude quality and turning acceleration, and the beam control device 3 is provided with a means 32 for calculating a tracking beam scanning schedule and scanning azimuth and elevation angle corresponding to the selected scanning mode. From the data indicating the track altitude quality and the data indicating the moving state, the continuous tracking beam scanning mode most suitable to the track position and altitude state is selected, and the selected tracking beam scanning is performed to radiate the tracking beam to a target.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic scanning type three-dimensional radar device.

[0002]

2. Description of the Related Art A conventional electronic scanning type three-dimensional radar device that adaptively performs beam scanning has a function of uniformly scanning a radar coverage area with a search beam, and a target for each target detected by the beam scanning with the search beam. It has the function of predicting its track position and directing the tracking beam to it. In this case, the scanning of the tracking beam is usually fixed, and the angle measurement is performed by simultaneously scanning a pair of beams as shown in FIG.

[0003]

In this conventional three-dimensional radar device, since the angle measurement is performed with a fixed beam, the range in which the angle can be measured is limited, and the quality of the predicted position of the track being tracked is poor. Even if the tracking beam is scanned, it may not be within the range in which the target angle can be measured. Conventionally, in order to detect such a target next time, it has to wait until detection by the search beam several seconds later, and the track data update time interval for that target becomes long, and there is a problem that tracking performance deteriorates. . An object of the present invention is to provide a three-dimensional radar device with improved tracking performance.

[0004]

A three-dimensional radar device according to the present invention comprises an antenna device, a signal processing device, and a beam control device, and the signal processing device responds to the altitude quality of a track and a motion situation such as turning acceleration. The beam control device has means for selecting the scanning form of the tracking beam, and the beam control device schedules the scanning and scanning direction of the tracking beam according to the selected scanning form.
It has means for calculating the elevation angle.

[0005]

[Operation] A continuous tracking beam scanning mode that is most suitable for the position and altitude of the track is selected from the data showing the altitude quality of the track and the data showing the motion state, and the selected tracking beam is scanned to obtain the tracking beam. To the target.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 shows a three-dimensional radar device according to an embodiment of the present invention. This three-dimensional radar device includes an antenna device 1, a signal processing device 2, and a beam control device 3. Antenna system 1
The receiver 11 and the transmitter 12 are provided in the. Further, the signal processing device 2 is provided with a target detection and angle measurement processing unit 21, a track position update processing unit 22, and a tracking beam form selection unit 23. Further, the beam control device 3 is provided with a beam scanning azimuth / elevation angle calculation unit 31 and a beam scanning scheduling unit 32.

In this configuration, the antenna device 1, the target detection / angle measurement processing unit 21 of the signal processing device 2, the track position update processing unit 22, and the beam scanning direction / direction of the beam control device 3
Each operation of the elevation angle calculation unit 31 is well known as a basic operation of the conventional three-dimensional radar device, and thus detailed description thereof will be omitted.

First, in the beam scanning scheduling unit 32 of the beam control device 3, as shown in FIG. 2, the tracking beam is scheduled twice in succession.
In this state, the tracking beam form selection unit 23 of the signal processing unit 2 uses the data showing the altitude quality of the track and the data showing the turning acceleration in the track information input from the track position update processing unit 22 to display the data shown in FIG. As shown, the scanning form of the tracking beam is determined, and the beam scanning scheduling unit 32
Notify the scanning form to. In addition, the track position, altitude, and speed are added to this notification.

In the beam scanning scheduling unit 32,
Upon receiving this notification, the time for tracking beam scanning is allocated, and the beam scanning azimuth / elevation angle calculation unit 31 calculates the predicted position / altitude of the target at the allocated time, and the position / altitude is within the measurable range of the tracking beam. The scanning azimuth / elevation angle of the tracking beam is calculated so that it becomes the center. As a result, the antenna device 1 performs tracking beam scanning with the scanning form, the scanning time, and the azimuth / elevation angle determined in the preprocessing.

[0010]

As described above, according to the present invention, for the tracking beam for scanning the predicted position of the track, the scanning form of the tracking beam for scanning is selected according to the altitude quality of the track and the motion condition such as turning acceleration. As a result, the tracking beam can be reliably emitted to the target, the quality of position data of the track being tracked can be improved without increasing the update time interval of the track data, and tracking performance can be improved. There is an effect that can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a three-dimensional radar device of the present invention.

FIG. 2 is an explanatory diagram of beam scanning scheduling.

FIG. 3 is a flowchart of beam scanning mode selection according to the present invention.

FIG. 4 is an explanatory diagram of a conventional tracking beam scanning mode.

[Explanation of symbols]

 1 Antenna device 2 Signal processing device 3 Beam control device 21 Target detection and angle measurement processing unit 22 Track position update processing unit 23 Tracking beam form selection unit 31 Beam scanning azimuth / elevation angle calculation unit 32 Beam scanning scheduling unit

Claims (1)

[Claims] 1. A signal processing device for notifying a tracking beam scan of a track being tracked, and a beam control device for scheduling a tracking beam scan in response to the notification and calculating a scanning azimuth / elevation angle of the tracking beam. In the three-dimensional radar device, the signal processing device has means for selecting a scanning form of the tracking beam according to the motion quality such as the altitude quality of the track and the turning acceleration, and the beam control device according to the selected scanning form. A three-dimensional radar device having means for scheduling tracking beam scanning and calculating a scanning azimuth / elevation angle.